Lenovo PD firmware for Realtek controller RTS5457, taken from LCFC board NM-C061 and compressed with 7-Zip; the name also lists a CRC value of 65C67AE7 for checking integrity. LCFC is Lenovo's own ODM and uses NM-xxxx board numbers printed on the PCB. When a ThinkPad or IdeaPad shows no USB-C charging, a damaged PD firmware image is a common cause, and rewriting the controller's small SPI flash with a programmer such as a CH341A often restores it. Save the original read before erasing anything.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosdumpcomputer. Enginerys does not host this file.
How to open a .7z file
High-ratio compressed archive, often used for large BIOS collections.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →